{"id":3255,"date":"2025-10-02T13:57:45","date_gmt":"2025-10-02T05:57:45","guid":{"rendered":"https:\/\/www.chuxin-smt.com\/?p=3255"},"modified":"2025-10-10T21:21:37","modified_gmt":"2025-10-10T13:21:37","slug":"slug-the-anatomy-of-a-wave-soldering-machine","status":"publish","type":"post","link":"https:\/\/www.chuxin-smt.com\/pt\/slug-the-anatomy-of-a-wave-soldering-machine\/","title":{"rendered":"A anatomia de uma m\u00e1quina de solda por onda"},"content":{"rendered":"<p>&nbsp;<\/p>\n<h2><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">A estrutura central da linha de produ\u00e7\u00e3o SMT<\/span><\/span><\/span><\/span><\/h2>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Uma linha de produ\u00e7\u00e3o SMT (tecnologia de montagem em superf\u00edcie) \u00e9 um sistema de montagem automatizado concebido para a produ\u00e7\u00e3o precisa e de grande volume de placas de circuito impresso (PCB). Compreender a sua estrutura central \u00e9 crucial para dominar a montagem e a soldadura eficientes de componentes electr\u00f3nicos. Todo o processo consiste numa s\u00e9rie de etapas cuidadosamente coordenadas, cada uma delas realizada por equipamento especializado. A base desta linha de produ\u00e7\u00e3o automatizada \u00e9 normalmente formada por v\u00e1rias m\u00e1quinas-chave ligadas para garantir uma transi\u00e7\u00e3o perfeita da placa nua para o produto acabado.<\/span><\/span><\/span><\/span><\/p>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">No centro da estrutura da linha de produ\u00e7\u00e3o SMT est\u00e3o os seguintes componentes principais:<\/span><\/span><\/span><\/span><\/p>\n<ul>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Carregador de PCB:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> O processo come\u00e7a <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/difference-between-loader-and-unloader-in-smt-lines\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">com um carregador de placas de circuito impresso<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> , que alimenta automaticamente as placas nuas das cassetes para a linha de produ\u00e7\u00e3o. Este passo inicial elimina o manuseamento manual e reduz o risco de contamina\u00e7\u00e3o e danos. Na outra extremidade, um descarregador de PCBs recolhe as PCBs completas e empilha-as para a fase seguinte de produ\u00e7\u00e3o ou de teste. O manuseamento automatizado da linha de produ\u00e7\u00e3o \u00e9 crucial para manter uma produ\u00e7\u00e3o cont\u00ednua e de alta velocidade <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">. <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.electronicdesign.com\/technologies\/components\/article\/21211105\/electronic-design-the-basics-of-surface-mount-technology-smt\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[Fonte: Electronic Design].<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Impressora de pasta de solda:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> Uma vez carregada a placa nua, \u00e9 enviada para uma impressora de pasta de soldadura. Esta m\u00e1quina utiliza um est\u00eancil e um raspador para aplicar uma camada precisa de pasta de solda nas almofadas espec\u00edficas onde os componentes s\u00e3o colocados. A precis\u00e3o nesta fase \u00e9 crucial, uma vez que uma pasta de solda insuficiente ou excessiva pode resultar em defeitos de soldadura, tais como aberturas ou pontes de solda <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">. <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.epectec.com\/pcb\/assembly\/smt-process.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[Fonte: Epec Engineered Technologies]<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">M\u00e1quinas de coloca\u00e7\u00e3o de chips:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> Estes s\u00e3o o cora\u00e7\u00e3o da linha de produ\u00e7\u00e3o SMT. Recolhem componentes individuais de montagem em superf\u00edcie a partir de bobinas ou tabuleiros e colocam-nos com precis\u00e3o nas placas. As m\u00e1quinas modernas funcionam a velocidades extremamente elevadas, capazes de colocar milhares de componentes por hora com elevada precis\u00e3o, o que \u00e9 crucial para a efici\u00eancia da montagem SMT.<\/span><\/span><\/span><\/span><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">M\u00e1quina de soldar (soldadura por refluxo ou por onda):<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> Ap\u00f3s a coloca\u00e7\u00e3o dos componentes, a placa de circuito impresso tem de ser aquecida para derreter a pasta de solda, criando uma liga\u00e7\u00e3o el\u00e9ctrica permanente. O m\u00e9todo mais comum utilizado em SMT \u00e9 <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/how-does-a-reflow-oven-work\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">soldadura por refluxo<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> . A placa \u00e9 movida numa correia transportadora atrav\u00e9s de m\u00faltiplas zonas de aquecimento, seguindo um <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/slug-mastering-the-pcb-reflow-temperature-profile-2\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">perfil de temperatura<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> para garantir que todas as juntas de solda s\u00e3o formadas corretamente sem danificar os componentes <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.pcb-technologies.com\/smt-assembly-a-comprehensive-guide\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[fonte: PCB Technologies].<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> . Para placas com componentes de furo passante, <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/what-is-wave-soldering\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">uma soldadura por onda<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> \u00e9 utilizada uma m\u00e1quina que passa a placa atrav\u00e9s de uma onda de solda derretida.<\/span><\/span><\/span><\/span><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Transportadores de PCB: A liga\u00e7\u00e3o de todas estas m\u00e1quinas \u00e9 a <\/span><\/span><\/span><\/span><\/strong><a href=\"https:\/\/www.chuxin-smt.com\/pt\/slug-the-complete-guide-to-pcb-conveyors\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Transportador de PCB<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> sistema <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">. Estes transportadores automatizados transportam placas de circuito impresso de uma esta\u00e7\u00e3o de trabalho para a seguinte. A velocidade e a estabilidade do transportador s\u00e3o cruciais para <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/pcb-conveyors-optimize-line-layout-and-improve-efficiency\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">otimiza\u00e7\u00e3o do fluxo de trabalho<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> e evitar estrangulamentos ou desloca\u00e7\u00e3o de componentes durante o transporte. As linhas mais complexas podem tamb\u00e9m incorporar transportadores de reserva ou portas de vaiv\u00e9m para gerir dinamicamente o processo de produ\u00e7\u00e3o.<\/span><\/span><\/span><\/span><\/li>\n<\/ul>\n<h2><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Prepara\u00e7\u00e3o da placa: \u00c1reas de fluxo e pr\u00e9-aquecimento<\/span><\/span><\/span><\/span><\/h2>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Quando um conjunto de PCB passa por uma m\u00e1quina de soldadura por onda, entra primeiro nas zonas de aplica\u00e7\u00e3o de fluxo e de pr\u00e9-aquecimento. Estas fases iniciais s\u00e3o cruciais para preparar a placa para a forma\u00e7\u00e3o de uma junta de soldadura bem sucedida. Saltar estes passos ou geri-los de forma incorrecta pode resultar em in\u00fameros defeitos de soldadura.<\/span><\/span><\/span><\/span><\/p>\n<h3><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">O papel da zona de fluxo<\/span><\/span><\/span><\/span><\/h3>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Antes de a placa de circuito impresso entrar em contacto com a solda fundida, passa por uma zona de fluxo, onde \u00e9 revestida com uma camada de fluxo. A principal fun\u00e7\u00e3o do fluxo \u00e9 limpar a superf\u00edcie met\u00e1lica e prepar\u00e1-la para a soldadura. Isto \u00e9 feito de tr\u00eas formas principais:<\/span><\/span><\/span><\/span><\/p>\n<ul>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Remo\u00e7\u00e3o de \u00f3xidos:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> As superf\u00edcies met\u00e1licas (incluindo os cabos dos componentes e as placas de circuito impresso) formam naturalmente camadas de \u00f3xido quando expostas ao ar. Estas camadas de \u00f3xido impedem a solda de formar uma boa liga\u00e7\u00e3o met\u00e1lica. O fluxo cont\u00e9m activadores qu\u00edmicos que removem eficazmente estes \u00f3xidos <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">. <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.aimsolder.com\/technical-articles\/importance-flux-soldering-applications\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[Fonte: AIM Solder]<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Melhoria da humidade:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> O fluxo limpa a superf\u00edcie, permitindo que a solda derretida seja \u201cmolhada\u201d, ou distribu\u00edda uniformemente, sobre as almofadas de metal e os cabos. Esta molhagem \u00e9 crucial para formar juntas de solda fortes e fi\u00e1veis.<\/span><\/span><\/span><\/span><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Evita a re-oxida\u00e7\u00e3o:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> O fluxo forma uma barreira protetora nas superf\u00edcies limpas, impedindo-as de re-oxidar \u00e0 medida que a placa passa pela zona de aquecimento da m\u00e1quina antes de chegar \u00e0 onda de solda.<\/span><\/span><\/span><\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">O fluxo pode ser aplicado atrav\u00e9s de uma variedade de m\u00e9todos, incluindo pulveriza\u00e7\u00e3o, forma\u00e7\u00e3o de espuma ou imers\u00e3o, sendo o fluxo por pulveriza\u00e7\u00e3o o m\u00e9todo mais comum nos equipamentos modernos devido \u00e0 sua elevada precis\u00e3o e controlo. Para obter informa\u00e7\u00f5es mais pormenorizadas, <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">ver a nossa <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/wave-soldering-flux-selection-and-maintenance-guide\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">guia para a sele\u00e7\u00e3o e manuten\u00e7\u00e3o de fluxos.<\/span><\/span><\/span><\/span><\/a><\/p>\n<h3><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Fase cr\u00edtica de aquecimento<\/span><\/span><\/span><\/span><\/h3>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Ap\u00f3s a aplica\u00e7\u00e3o do fluxo, a placa de circuito impresso entra imediatamente na zona de pr\u00e9-aquecimento. Esta fase consiste em aumentar gradualmente a temperatura de todo o conjunto. O processo de pr\u00e9-aquecimento faz mais do que apenas aquecer a placa; tamb\u00e9m desempenha v\u00e1rias fun\u00e7\u00f5es importantes:<\/span><\/span><\/span><\/span><\/p>\n<ul>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Ativa\u00e7\u00e3o do fluxo:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> O calor ativa os qu\u00edmicos do fluxo, aumentando a sua capacidade de limpar superf\u00edcies met\u00e1licas. Os diferentes fluxos t\u00eam intervalos de temperatura de ativa\u00e7\u00e3o espec\u00edficos, pelo que <\/span><\/span><\/span><\/span><a href=\"\/pt\/httpsa-comprehensive-guide-to-wave-soldering-temperature\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">controlo da temperatura<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> \u00e9 um par\u00e2metro cr\u00edtico <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">. <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.epectec.com\/pcb\/wave-soldering\/pre-heat-stage.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[Fonte: EpecTec]<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Evapora\u00e7\u00e3o do solvente:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> O fluxo l\u00edquido cont\u00e9m solventes que devem evaporar antes de a placa ser exposta \u00e0 onda de solda. Se os solventes n\u00e3o forem removidos, estes solventes entrar\u00e3o em ebuli\u00e7\u00e3o violenta quando entrarem em contacto com a solda fundida, causando defeitos como bolas de solda e vazios.<\/span><\/span><\/span><\/span><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Reduzir o choque t\u00e9rmico:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> O papel mais importante do pr\u00e9-aquecimento \u00e9 minimizar o choque t\u00e9rmico. O choque t\u00e9rmico refere-se ao stress imposto a uma placa de circuito impresso e aos seus componentes quando as temperaturas mudam rapidamente. A zona de pr\u00e9-aquecimento aquece lentamente os componentes a uma temperatura espec\u00edfica (normalmente entre 100\u00b0C e 130\u00b0C) para garantir que a diferen\u00e7a de temperatura entre a placa e a onda de solda (aproximadamente 250\u00b0C) n\u00e3o seja demasiado grande. Este aumento gradual da temperatura evita danos como o empeno da placa e a fissura\u00e7\u00e3o ou delamina\u00e7\u00e3o dos componentes <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">. <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.pcb-technologies.com\/blog\/prevent-thermal-shock-in-pcbs\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[Fonte: PCB Technologies].<\/span><\/span><\/span><\/span><\/a><\/li>\n<\/ul>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">A execu\u00e7\u00e3o correta das fases de fluxagem e pr\u00e9-aquecimento estabelece as bases <\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/slug-a-step-by-step-guide-to-the-wave-soldering-process\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">para todo o processo de soldadura por onda<\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> , A Comiss\u00e3o Europeia est\u00e1 a trabalhar no sentido de assegurar que os componentes est\u00e3o qu\u00edmica e termicamente preparados para as etapas finais de soldadura.<\/span><\/span><\/span><\/span><\/p>\n<h2><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">O cora\u00e7\u00e3o da m\u00e1quina: potes de soldadura e mec\u00e2nica ondulat\u00f3ria<\/span><\/span><\/span><\/span><\/h2>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">O cadinho de solda \u00e9 o cora\u00e7\u00e3o de qualquer m\u00e1quina de solda por onda, servindo como um reservat\u00f3rio para a solda derretida. O cadinho inicia o processo de soldadura aquecendo a liga de solda s\u00f3lida (normalmente uma composi\u00e7\u00e3o sem chumbo, como estanho-prata-cobre (SAC)) at\u00e9 um estado l\u00edquido preciso. A manuten\u00e7\u00e3o de uma temperatura consistente dentro da panela \u00e9 crucial para obter juntas de solda fi\u00e1veis. Conforme discutido no nosso <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/slug-a-comprehensive-guide-to-wave-soldering-temperature\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">guia de temperatura de soldadura por onda<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> , Mesmo pequenas flutua\u00e7\u00f5es podem levar a defeitos como choque t\u00e9rmico ou humedecimento incompleto. Com o tempo, a superf\u00edcie da solda fundida reage com o ar, formando uma camada de \u00f3xidos e impurezas conhecida como esc\u00f3ria. A remo\u00e7\u00e3o regular desta esc\u00f3ria \u00e9 crucial, uma vez que pode introduzir contaminantes durante o processo de soldadura e causar defeitos como a forma\u00e7\u00e3o de gelo e a forma\u00e7\u00e3o de pontes <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.kester.com\/knowledge-base\/dross-and-drossing\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[fonte: Kester]<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> .<\/span><\/span><\/span><\/span><\/p>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">A partir deste pote de solda cuidadosamente controlado, a solda derretida \u00e9 bombeada para cima atrav\u00e9s do bocal para formar uma onda de solda - o cora\u00e7\u00e3o de todo o processo de solda. Os modernos sistemas de soldadura por onda utilizam quase universalmente um processo de onda dupla para lidar com PCBs complexos e de tecnologia mista. Compreender o papel \u00fanico de cada onda \u00e9 fundamental para dominar o processo de soldadura, um t\u00f3pico que iremos explorar \u00e0 medida que <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/slug-a-deep-dive-into-solder-wave-dynamics\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">aprofundar a din\u00e2mica das ondas de solda<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> .<\/span><\/span><\/span><\/span><\/p>\n<ol>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Onda Turbulenta (Chip Wave):<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> A primeira onda que uma placa de circuito impresso encontra \u00e9 um fluxo turbulento, tipicamente bidirecional. O seu fluxo agressivo e agitado foi concebido para garantir uma cobertura completa da solda, for\u00e7ando a solda a entrar em espa\u00e7os apertados, tais como orif\u00edcios de passagem revestidos e sob componentes de montagem em superf\u00edcie. Esta a\u00e7\u00e3o supera a sombra dos componentes e promove uma boa humidifica\u00e7\u00e3o de todas as superf\u00edcies sold\u00e1veis <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">. <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.epectec.com\/pcb\/wave-soldering\/process.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[Fonte: Epec Engineered Technologies]<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Onda laminar (suave):<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> Ap\u00f3s a onda turbulenta, o PCB passa por uma segunda onda, mais suave. A onda laminar flui numa \u00fanica dire\u00e7\u00e3o, resultando numa superf\u00edcie calma e est\u00e1vel. O seu objetivo \u00e9 endireitar e dar forma: remove o excesso de solda depositado pela onda turbulenta, elimina as pontes de solda entre pinos pouco espa\u00e7ados e, por fim, cria um filete de solda perfeito.<\/span><\/span><\/span><\/span><\/li>\n<\/ol>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">A efic\u00e1cia de todo o sistema depende da calibra\u00e7\u00e3o exacta das carater\u00edsticas din\u00e2micas da onda de solda. Par\u00e2metros cr\u00edticos como <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/how-to-adjust-solder-wave-height-for-pcb-soldering-quality\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">altura da onda<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> , A velocidade do transportador (que determina o tempo de contacto) e o \u00e2ngulo do transportador devem estar perfeitamente sincronizados. O objetivo \u00e9 assegurar um tempo de contacto suficiente para uma molhagem adequada da placa de circuito impresso sem submeter os componentes a um stress t\u00e9rmico excessivo. Este equil\u00edbrio entre um banho de solda est\u00e1vel e uma onda de solda din\u00e2mica determina, em \u00faltima an\u00e1lise, a qualidade e a fiabilidade do produto final.<\/span><\/span><\/span><\/span><\/p>\n<h2><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Montagem final: arrefecimento, limpeza e inspe\u00e7\u00e3o<\/span><\/span><\/span><\/span><\/h2>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">O processo de soldadura de placas de circuito impresso (PCB) n\u00e3o termina quando a solda derrete. A fase de arrefecimento \u00e9 um passo cr\u00edtico e controlado que permite que a solda derretida solidifique, formando uma liga\u00e7\u00e3o el\u00e9ctrica forte e fi\u00e1vel. Se esta fase for apressada ou executada incorretamente, o trabalho meticuloso de pr\u00e9-aquecimento e refluxo pode ser desfeito, dando origem a uma s\u00e9rie de defeitos.<\/span><\/span><\/span><\/span><\/p>\n<h3><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">O papel fundamental da taxa de arrefecimento<\/span><\/span><\/span><\/span><\/h3>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Depois de a placa de circuito impresso atingir a temperatura m\u00e1xima durante o processo de soldadura, entra em <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/slug-a-comprehensive-guide-to-the-reflow-oven-cooling-zone\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">a zona de arrefecimento<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> . O principal objetivo aqui \u00e9 reduzir a temperatura do componente a uma taxa controlada. Esta taxa \u00e9, sem d\u00favida, o par\u00e2metro mais cr\u00edtico durante esta fase, uma vez que tem um impacto direto na microestrutura da junta de soldadura, afectando assim a sua resist\u00eancia mec\u00e2nica e fiabilidade a longo prazo.<\/span><\/span><\/span><\/span><\/p>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">As taxas de arrefecimento \u00f3ptimas (normalmente cerca de -4\u00b0C por segundo) s\u00e3o cruciais para o desenvolvimento de uma microestrutura de gr\u00e3o fino na solda <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.circuitnet.com\/experts\/85915.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[fonte: CircuitNet].<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> . Esta estrutura de gr\u00e3o fino aumenta a resist\u00eancia \u00e0 fadiga e a durabilidade geral da junta. No entanto, os desvios da taxa de arrefecimento ideal podem causar problemas graves:<\/span><\/span><\/span><\/span><\/p>\n<ul>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Arrefecimento demasiado r\u00e1pido:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> Uma queda r\u00e1pida da temperatura pode provocar um choque t\u00e9rmico, gerando tens\u00f5es que podem rachar o substrato da placa de circuito impresso ou os pr\u00f3prios componentes. Isto \u00e9 especialmente perigoso para condensadores de cer\u00e2mica sens\u00edveis.<\/span><\/span><\/span><\/span><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Arrefecimento demasiado lento:<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> O arrefecimento demasiado lento pode levar ao crescimento excessivo de compostos intermet\u00e1licos (IMC) na interface solda-componente-chumbo. Embora uma camada fina de IMC seja desej\u00e1vel para uma boa liga\u00e7\u00e3o, uma camada espessa e quebradi\u00e7a de IMC pode comprometer a integridade da junta, tornando-a suscet\u00edvel de falhar sob tens\u00e3o ou vibra\u00e7\u00e3o <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">. <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.belpower-solutions.com\/resource\/soldering-process-control-for-pcba\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[Fonte: Bel Power Solutions].<\/span><\/span><\/span><\/span><\/a><\/li>\n<\/ul>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Masteriza\u00e7\u00e3o <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/reflow-soldering-cooling-system-importance-optimization\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">o seu sistema de arrefecimento para soldadura por refluxo<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> \u00e9 fundamental para evitar estes problemas e garantir resultados consistentes e de alta qualidade.<\/span><\/span><\/span><\/span><\/p>\n<h3><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Limpeza e inspe\u00e7\u00e3o p\u00f3s-soldadura<\/span><\/span><\/span><\/span><\/h3>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Depois de a placa ter arrefecido e as juntas de soldadura terem solidificado, a montagem passa para a fase de p\u00f3s-soldadura para verificar a qualidade e prepar\u00e1-la para a aplica\u00e7\u00e3o final.<\/span><\/span><\/span><\/span><\/p>\n<p><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">1. Limpeza:<\/span><\/span><\/span><\/span><\/strong><br \/>\n<span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> O processo de soldadura deixa frequentemente res\u00edduos de fluxo. Embora os fluxos \u201cn\u00e3o limpos\u201d sejam comuns, os seus res\u00edduos podem por vezes interferir com a sondagem durante os testes em circuito ou impedir que os revestimentos conformacionais adiram corretamente. A limpeza \u00e9 essencial para aplica\u00e7\u00f5es de elevada fiabilidade nas ind\u00fastrias autom\u00f3vel, m\u00e9dica ou aeroespacial. Os res\u00edduos de fluxo podem ser \u00e1cidos e absorver a humidade do ar, causando potencialmente corros\u00e3o e curto-circuitos el\u00e9ctricos ao longo do tempo <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.epectec.com\/pcb\/assembly\/post-soldering-cleaning.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[fonte: Epec].<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> . Pode ser utilizada uma variedade de m\u00e9todos de limpeza, incluindo sistemas aquosos, semi-aquosos e \u00e0 base de solventes, para remover estes contaminantes nocivos.<\/span><\/span><\/span><\/span><\/p>\n<p><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">2. Inspe\u00e7\u00e3o e ensaio:<\/span><\/span><\/span><\/span><\/strong><br \/>\n<span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> Para garantir a qualidade, cada componente \u00e9 submetido a uma inspe\u00e7\u00e3o rigorosa. Os principais m\u00e9todos incluem:<\/span><\/span><\/span><\/span><\/p>\n<ul>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Inspe\u00e7\u00e3o \u00d3tica Automatizada (AOI):<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> Um sistema AOI utiliza uma c\u00e2mara de alta resolu\u00e7\u00e3o para analisar a placa de circuito impresso e compar\u00e1-la com um modelo detalhado de uma placa \u201cdourada\u201d. Pode detetar rapidamente defeitos como pontes de solda, circuitos abertos, solda insuficiente e coloca\u00e7\u00e3o incorrecta de componentes.<\/span><\/span><\/span><\/span><\/li>\n<li><strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Inspe\u00e7\u00e3o automatizada por raios X (AXI):<\/span><\/span><\/span><\/span><\/strong><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> O AXI \u00e9 crucial para componentes com juntas de soldadura ocultas, tais como matrizes de grelha esf\u00e9rica (BGAs). Os raios X podem penetrar no corpo do componente e gerar imagens das liga\u00e7\u00f5es subjacentes, revelando defeitos que os sistemas \u00f3pticos n\u00e3o conseguem detetar, tais como <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/how-to-reduce-voids-in-reflow-soldering-process-tips\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">vazios de solda<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> ou cal\u00e7\u00f5es <\/span><\/span><\/span><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">. <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.creativehitech.com\/blog\/basics-of-automated-x-ray-inspection-axi-for-pcb\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">[Fonte: Creative Hi-Tech].<\/span><\/span><\/span><\/span><\/a><\/li>\n<\/ul>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Ap\u00f3s esta inspe\u00e7\u00e3o, \u00e9 normalmente efectuado um teste funcional para garantir que a placa est\u00e1 corretamente alimentada e a funcionar como previsto. Este controlo final verifica se toda a <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/slug-a-deep-dive-into-the-reflow-soldering-process\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">refluxo<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> ou <\/span><\/span><\/span><\/span><a href=\"https:\/\/www.chuxin-smt.com\/pt\/slug-a-step-by-step-guide-to-the-wave-soldering-process\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">processo de soldagem por onda<\/span><\/span><\/span><\/span><\/a><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"> foi conclu\u00edda com \u00eaxito, resultando num conjunto eletr\u00f3nico fi\u00e1vel e totalmente funcional.<\/span><\/span><\/span><\/span><\/p>\n<h2><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">fonte<\/span><\/span><\/span><\/span><\/h2>\n<ul>\n<li><a href=\"https:\/\/www.aimsolder.com\/technical-articles\/importance-flux-soldering-applications\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">AIM Solder - A import\u00e2ncia do fluxo nas aplica\u00e7\u00f5es de soldadura<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.belpower-solutions.com\/resource\/soldering-process-control-for-pcba\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Bel Power Solutions - Controlo do processo de soldadura PCBA<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.circuitnet.com\/experts\/85915.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">CircuitNet - Efeitos da taxa de arrefecimento<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.creativehitech.com\/blog\/basics-of-automated-x-ray-inspection-axi-for-pcb\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Creative Hi-Tech - No\u00e7\u00f5es b\u00e1sicas sobre a inspe\u00e7\u00e3o autom\u00e1tica de PCB por raios X (AXI)<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.electronicdesign.com\/technologies\/components\/article\/21211105\/electronic-design-the-basics-of-surface-mount-technology-smt\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Conce\u00e7\u00e3o eletr\u00f3nica - No\u00e7\u00f5es b\u00e1sicas sobre a tecnologia de montagem em superf\u00edcie (SMT)<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.epectec.com\/pcb\/assembly\/post-soldering-cleaning.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Epec Engineered Technologies - Limpeza de PCB p\u00f3s-solda<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.epectec.com\/pcb\/assembly\/smt-process.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Epec Engineered Technologies - Processo de montagem SMT<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.epectec.com\/pcb\/wave-soldering\/process.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Epec Engineering Technology - Processo de soldadura por onda<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.epectec.com\/pcb\/wave-soldering\/pre-heat-stage.html\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Epec Engineered Technologies - Est\u00e1gio de pr\u00e9-aquecimento de solda por onda<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.kester.com\/knowledge-base\/dross-and-drossing\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Kester - Borras e borras<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.pcb-technologies.com\/blog\/prevent-thermal-shock-in-pcbs\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">PCB Technology - Como evitar o choque t\u00e9rmico nas PCBs<\/span><\/span><\/span><\/span><\/a><\/li>\n<li><a href=\"https:\/\/www.pcb-technologies.com\/smt-assembly-a-comprehensive-guide\/\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">Tecnologia PCB - Montagem SMT - Guia completo<\/span><\/span><\/span><\/span><\/a><\/li>\n<\/ul>\n<p><span dir=\"auto\" style=\"vertical-align: inherit;\"><span dir=\"auto\" style=\"vertical-align: inherit;\">&#8220;`<\/span><\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>&nbsp; The core structure of the SMT production line An SMT (surface mount technology) production line is an automated assembly [&hellip;]<\/p>","protected":false},"author":1,"featured_media":3254,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"categories":[1],"tags":[],"class_list":["post-3255","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-company-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/posts\/3255","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/comments?post=3255"}],"version-history":[{"count":0,"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/posts\/3255\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/media\/3254"}],"wp:attachment":[{"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/media?parent=3255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/categories?post=3255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chuxin-smt.com\/pt\/wp-json\/wp\/v2\/tags?post=3255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}